feat(m02-df): 표준 표 판 · standardsList — 두 표 보기 · 칸 고치기 · 저장 · 처음 값으로

- M02_DF_Standards.ts — renderStandards(host, on) · standardsList()(단위 고르기 · 끝수 제안 · 동기) · loadStandards · 서버 GET/PUT/DELETE /api/m02/df/standards
- 시험 test_m02_df_standards.py 에 standardsList 목록(단위 반올림 · 금액 지위 → 자리 · 버림)

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01BU9gbNE3aWFUvE61pS2WGt

M02_MasterTemplete/DataFlow/M02_DF_Standards.css

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+/* 단가산출 흐름도 — 표준 표 판(M02_DF_Standards.ts) · 단추 · 칸 크기는 공용 그대로(덮지 않음) */
+.m02-df-std {
+  display: flex;
+  flex-direction: column;
+  gap: var(--spacing-8, 8px);
+}
+
+.m02-df-std__head {
+  display: flex;
+  align-items: center;
+  gap: var(--spacing-8, 8px);
+}
+
+.m02-df-std__head h3 {
+  margin: 0 auto 0 0;
+}
+
+.m02-df-std__state,
+.m02-df-std__hint,
+.m02-df-std__line {
+  color: var(--color-text-muted, #6b7280);
+}
+
+.m02-df-std__hint {
+  margin: 0;
+}
+
+.m02-df-std__scroll {
+  overflow-x: auto;
+}
+
+.m02-df-std__table {
+  border-collapse: collapse;
+  width: 100%;
+}
+
+.m02-df-std__table th,
+.m02-df-std__table td {
+  border: 1px solid var(--color-border, #e5e7eb);
+  padding: 2px 6px;
+  text-align: left;
+  white-space: nowrap;
+}
+
+.m02-df-std__table td[tabindex] {
+  cursor: pointer;
+}
+
+.m02-df-std__table th {
+  background: var(--color-surface-muted, rgba(127, 127, 127, 0.08));
+}
+
+.m02-df-std__notes {
+  margin: 0;
+  padding-left: 0;
+  list-style: none;
+}